4m Slim Jim Antenna
- This 4m Slim Jim Antenna is cheap and easy to build yet it greatly out performs the more usual dipole due to its low angle of radiation. An SWR of 1:1 is obtainable across the 4m ham radio FM band with a simple adjustment.
rtl-sdr.com A blog about RTL-SDR
- RTL-SDR is a very cheap software defined radio that uses a DVB-T TV tuner dongle based on the RTL2832U chipset. This is a blog about rtl-sdr, software defined radio and their developments and applications.
Elecraft K2 Improving CW Filter
- Here is a cheap and simple way to significantly improve the K2 CW filter(s). With this mod, even strong signals will fade to black as they tune out of the filter pass band
Using cheap tetrodes in amplifiers
- This article is written to dispel some of the misconceptions and misunderstandings about some of the tetrode based linear amplifiers, which are currently available on the amateur market.